<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script type="text/javascript">
    /**
     *
     * @param name {string}
     * @param age  {number}
     * @constructor
     */
    function Person(name, age) {
        this.name = name;
        this.age = age;
    }

    var p = new Person('张三', 18);

    var b;
    b = [1, 2];
    console.log(b);
    b = null; // GC回收
</script>
</html>